KR20170080448A - Hybrid suspension arm for a vehicle and method for manufacturing same - Google Patents

Abstract

The hybrid suspension suspension for a vehicle comprises: a suspended suspension arm body made of steel; A plastic insert molding inserted and joined to the suspension arm body; A coupling flange is formed on the suspension arm body; The coupling flange is inserted into and bonded to the plastic insert molding, thereby providing a suspension of low weight and high rigidity.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid suspension arm for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present disclosure generally relates to a suspension arm of a suspension of a vehicle, and more particularly, to a hybrid suspension arm for a vehicle, which is made of composite material of plastic and steel, such as an upper control arm and a lower control arm, And a manufacturing method thereof.

Generally, a suspension of a vehicle is a device that connects a vehicle body and a wheel. The suspension of the vehicle includes a spring for absorbing vibration or shock transmitted from the road surface to the vehicle body, a shock absorber for adjusting the operation of the spring, a suspension arm or a suspension link for controlling the operation of the wheel.

[0004] Suspension devices that control the operation of the wheels include a swing arm type, a wishbone type, and a McPherson strut type. Suspension devices using the bidirectional control type include suspension wheels that connect a wheel and a knuckle fastened to the vehicle body Arm). That is, one end of the suspension arm is connected to a cross member or a subframe constituting the vehicle body, and the other end is connected to the knuckle via a ball joint. The suspension arm supports the wheels on the vehicle body through such a configuration and appropriately controls the toe-in of the wheels according to the running condition of the vehicle, thereby improving the straight running characteristic and the steering stability of the vehicle.

Such conventional suspension arms have been manufactured in a casting type and a press type. Specifically, according to the casting type method, a steel or aluminum molten metal is injected into a metal mold, and solidified and molded to produce a suspension arm. Also, according to the press type method, a steel plate of a steel material is manufactured by press-forming an upper plate and a lower plate, and the two plates are welded to manufacture a suspension arm.

However, in the above-described conventional suspension manufacturing method, a steel is cast or a steel material is used to manufacture the upper and lower plates by a press method and then welded. In this case, due to the characteristics of the steel material, the weight is heavy, a large number of manufacturing steps are required, and deformation and rigidity are liable to be weakened due to welding of the steel sheet. In order to solve the problems of the suspension arm of such a steel material and to achieve weight reduction, hybrid suspension arms of a composite material have been proposed and developed.

It is an object according to various embodiments of the present disclosure to increase the stiffness of a hybrid suspension arm for a vehicle, to prevent strength drop by an injection weld line, and to reduce corrosion concerns.

According to one embodiment, a hybrid suspension suspension for a vehicle comprises: a suspension arm body made of steel; An insert molding of a plastic material inserted and joined to the suspension arm body; And a coupling portion in which a suspension arm body and a portion of the insert molding intersect with each other to prevent separation between the suspension arm body and the insert molding.

 The engaging portion includes a flange structure, and the flange means includes: a coupling flange formed to be bent inward in the width direction of the suspension arm body; And a fixing part that is part of the plastic insert molding and is inserted by the coupling flange.

 The engaging portion includes a reinforcing structure, and the reinforcing structure may include a reinforcing plate inserted and fixed in the suspension arm body and in contact with the insert molding.

 The reinforcing plate is arranged in the cross-sectional direction of the suspension arm body, and the insert molding can wrap the reinforcing plate.

 At least one hole is formed in the reinforcing plate, and the insert molding can pass through the hole.

 The reinforcing plate is disposed in a direction parallel to the suspension arm body, and a part of the insert molding can be inserted and joined to the reinforcing plate.

 The end of the reinforcing plate may be formed to be bent inward in the width direction of the reinforcing plate.

 The engagement portion includes a button structure, the button structure including at least one hole formed in the suspension arm body; And one or more buttons formed from a plastic insert molding and inserted into and filled in one or more holes and extending to the peripheral edges of one or more holes.

According to another aspect of the present invention, there is provided a hybrid suspension suspension for a vehicle, comprising: a suspended suspension arm body made of a steel material; A plastic insert molding insert coupled to the suspension arm body; Wherein the suspension arm body is formed with a coupling flange bent inward in the width direction thereof; The engagement flange can be inserted and joined to the plastic insert molding.

 The suspension arm body includes two leg portions; And a joint portion integrally connecting the two leg portions.

 A bush pipe is welded to each of the front ends of the two leg portions; The ball joint pipe may also be welded to the distal end of the joint portion.

 The ball joint pipe is located at a central portion between the bush pipes; The bush pipes are arranged horizontally open; The ball joint pipe may be arranged to be opened in the vertical direction.

 The bushes are each press-fitted into the bush pipes; The ball joint pipe can be press-fitted to the ball joint pipe.

 Wherein the suspension arm body is formed with at least one hole penetrating therethrough; The plastic insert molding may be formed with one or more buttons that are inserted into one or more holes to be filled and extend to the peripheral edges of the at least one hole.

 The suspension arm body includes a joint portion integrally connecting two leg portions and two leg portions; The plastic insert molding also includes a joint portion integrally connecting two leg portions and two leg portions; The at least one hole includes at least one small-diameter hole arranged at a predetermined interval along the longitudinal direction in each of the two leg portions; The one or more buttons may be formed to have a size enlarged radially to the peripheral edge of the at least one small-diameter hole in addition to being filled and inserted in the at least one small-diameter hole.

 The at least one small-diameter hole includes two or more small-diameter holes arranged adjacent to each other; At least one large-diameter hole having a relatively large diameter is formed between the two or more small-diameter holes; A mid-diameter hole may be formed in the plastic insert molding in which a part of the plastic insert molding is inserted into the middle-diameter hole and extended radially to the peripheral edge of the middle-diameter hole.

 The at least one engagement hole includes a large-diameter hole formed in the joint portion of the suspension arm body; The large diameter hole may be formed in the plastic insert molding, in which a part of the plastic insert molding is inserted and the radially extending edge extends to the peripheral edge of the large diameter hole.

 In the plastic insert molding, at least one reinforcing rib in the form of a grid pattern may be integrally formed.

 The suspension arm body may include two leg portions.

 A bush-like projection in the form of a pipe is integrally formed on one leg portion; A plastic insert molding may be inserted and coupled to the bushing engagement protrusion.

 A plastic insert molding is coupled to the other leg portion by injection; A ball joint may be inserted into the coupling tip of the plastic insert molding to be integrally injection-coupled.

 A large-diameter hole is formed in the suspension arm body, and a bushing can be press-fitted into the large-diameter hole.

 The large-diameter hole may be formed on one side of the suspension arm body between the bush joint projection and the ball joint.

 The suspension arm body is formed with one or more heavy-weight holes; One or more buttons may be formed in the plastic insert molding in a manner that fills the heavy hole and extends radially to the peripheral edge of the heavy hole.

 At least one small-diameter hole is formed in the suspension arm body, and one or more small-diameter engagement rims may be formed in the plastic insert molding so as to extend radially to the peripheral edge of the small-diameter hole.

 A plastic insert molding is coupled to one leg by injection; A ball joint may be inserted into the coupling tip of the plastic insert molding to be integrally injection-coupled.

 A large-diameter bushing engagement hole is formed at the distal end of the other leg portion, and the bushing can be press-fitted into the large-diameter bushing engagement hole.

 The bush pipe can be integrally coupled to the corner where the two leg portions meet.

 The bush pipe may be disposed between the ball joint and the large-diameter bushing engagement hole.

 A thick-walled hole is formed at one leg portion; A flange having a large diameter bent toward the inside of the plastic insert molding may be provided on the suspension arm body.

 One or more small-diameter holes are formed through the two leg portions; The plastic insert molding may be formed with one or more buttons in a form that fills one or more small diameter holes and extends radially to the peripheral edge of the small diameter hole.

The one or more buttons may be formed in a circular or polygonal shape.

According to still another embodiment of the present invention, there is provided a method of manufacturing a hybrid suspension suspension for a vehicle, comprising: preparing a ball stud using a steel material; Making bearings using plastic; Joining the bearing to the ball stud; Making a suspension arm body using a steel plate; Attach bush pipes and ball joint pipe to the suspension arm body; Assembling the ball stud and bearing assembly into the ball joint pipe; The suspension arm body is inserted into the mold and the plastic resin is injected so that the suspension insert body is joined to the plastic insert molding; Pressing the bush into the bush pipe to assemble; The ball stud can be covered with a dust cover and fixed with a ring clip.

Lubricating oil can be injected into the bearing.

According to one embodiment of the present disclosure, a suspension insert body of steel is formed on the outside while a plastic insert molding is disposed on the inside, so that the section modulus of the steel suspension arm body can be sufficiently secured and the rigidity can be increased .

In addition, unnecessary portions which do not affect the rigidity are removed in the plastic insert molding to reduce the weld line of the injection molding, thereby suppressing the occurrence of cracks in the plastic insert molding to the maximum, thereby increasing the rigidity and improving the durability.

Further, in hybrid type suspension cylinders, it is possible to improve the ride comfort and steering stability of the vehicle by reducing the weight and increasing the rigidity.

BRIEF DESCRIPTION OF THE DRAWINGS The following drawings, which are incorporated herein by reference, illustrate a preferred embodiment of the present disclosure and, together with the detailed description of the disclosure, serve to provide a further understanding of the technical idea of the present disclosure, It should not be construed as limited.
1 is a perspective view of a hybrid suspension suspension for a vehicle manufactured by a manufacturing method according to an embodiment of the present disclosure;
FIG. 2 is an exploded perspective view of a hybrid suspension suspension for a vehicle manufactured by a manufacturing method according to an embodiment of the present disclosure; FIG.
3 is a rear view of a hybrid suspension suspension for a vehicle manufactured in accordance with a manufacturing method according to one embodiment of the present disclosure;
4 is a sectional view taken along line AA in Fig.
5 is a cross-sectional view of a ball joint of a hybrid suspension suspension for a vehicle according to one embodiment of the present disclosure;
6 is an assembly view showing a manufacturing procedure of a manufacturing method of a hybrid suspension suspension for a vehicle according to an embodiment of the present disclosure.
7 is a flowchart of a method of manufacturing a hybrid suspension suspension for a vehicle according to an embodiment of the present disclosure.
8 is a perspective view of a hybrid suspension suspension for a vehicle according to another embodiment of the present disclosure;
9 is a sectional view taken along line BB of Fig.
10 is a perspective view of a hybrid suspension suspension for a vehicle according to another embodiment of the present disclosure;
11 is a cross-sectional view taken along line CC of Fig.
12 is a bottom view of a suspension arm body provided with a reinforcing plate according to the present disclosure;
13 is a bottom view of a hybrid suspension suspension for a vehicle equipped with a reinforcing plate according to the present disclosure;
14A is a sectional view taken along the line A-A 'in FIG.
14B is a sectional view taken along the line B-B 'in FIG.
15 is a cross-sectional view of a hybrid suspension suspension for a vehicle equipped with another reinforcing plate according to the present disclosure;
16 is a cross-sectional view of a hybrid suspension suspension for a vehicle equipped with another reinforcing plate according to the present disclosure;
17 is a perspective view showing a structure in which a groove is applied to the ball bearing of FIG.
FIG. 18 is a perspective view showing a structure in which a slot is applied to the ball bearing of FIG. 5;
FIG. 19 is experimental data for determining the optimal number of buttons applied to a hybrid suspension suspension for a vehicle according to an embodiment of the present disclosure; FIG.

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

Fig. 1 is a perspective view of a hybrid suspension suspension 1 for a vehicle manufactured by a manufacturing method according to an embodiment of the present disclosure, and Fig. 2 is an exploded perspective view of the suspension suspension 1 of Fig.

The hybrid suspending arm 1 for a vehicle may include a suspension arm body 10 capable of manufacturing a high strength steel plate for a vehicle by a general pressing method.

The suspension arm body 10 may have a shape such as, for example, a " U " The U-shaped suspension arm body 10 may be used, for example, as an upper control arm of the suspension, but is not necessarily limited thereto.

The suspension arm body 10 may include two leg portions 12 and a joint portion 14 integrally connecting the two leg portions 12. A bush pipe 16 may be welded to each of the front ends of the two leg portions 12 and a tip end portion of the joint portion 14 may be welded to the ball joint pipe 18. Specifically, a semicylindrical coupling hole is formed at the distal end of each of the two leg portions 12 and at the tip of the joint portion 14, and the pipes 16 and 18 are fitted into the coupling holes and welded .

The ball joint pipe 18 may be located at a central portion between the bush pipes 16 and the bush pipes 16 are arranged to be opened horizontally while the ball joint pipe 18 is arranged vertically And can be arranged to be opened.

The bushes 30 may be press-fitted into the two bush pipes 16, and the bushes 30 may be fastened to the vehicle body by bolts or the like.

The ball joint 40 may be press-fitted to the ball joint pipe 18. The concrete structure of the ball joint 40 can be referred to Figs. 1 and 5. Fig.

The ball joint 40 includes a ball stud 41, a bearing 42 that rotatably supports the ball stud 41, a dust cover 43 that covers the ball stud 41 to prevent intrusion of foreign matter, A ring clip 44 for assembling the ball stud 43 to the ball stud 41 and a protector 45 covering the ball stud 41 from the opposite side of the bearing 42.

The joint portion 14 may be formed with a large-diameter hole 142 having a relatively large diameter, and each leg portion 12 is provided with a relatively large-sized small-diameter hole 122 and a small- 124 may be arranged at a predetermined interval. The diameter increases in the order of the small-diameter hole 124, the large-diameter hole 122, and the large-diameter hole 142. The large-diameter hole 122 may be disposed between the small-diameter holes 124. The number of the large-diameter hole 122 and the small-diameter hole 124 can be appropriately adjusted as needed.

The suspension insert body (10) may be coupled with a plastic insert molding (20).

The plastic insert molding 20 may have a shape similar to that of the suspension arm body 10 in general. That is, two leg portions 22 and a joint portion 24 thereof, and the joint portion 24 may be formed with a large-diameter hole 242 therethrough.

Diameter engagement hole 244 extending in the thickness direction and the radial direction is formed at the edge of the large diameter hole 142 of the joint portion 14. The large diameter engagement edge 244 is formed in the outer periphery of the plastic insert molding 20, Diameter hole 142 of the arm body 10 so that the plastic insert molding 20 inserted into the suspension arm body 10 is not pulled out from the suspension arm body 10, The bonding force between the body 10 and the plastic insert molding 20 is increased.

A plurality of buttons 220 may be formed on the respective leg portions 22 of the plastic insert molding 20 along the longitudinal direction at predetermined intervals.

Each button 224 is inserted into a small-diameter hole 124 formed in each leg portion 12 of the suspension arm body 10 to fill the small-diameter hole 124 when the plastic insert molding 20 is injected, To the peripheral edge of the outer circumferential surface. Each button 224 can increase the coupling force between the suspension arm body 10 and the plastic insert molding 20. [

The heavy metal engaging rim 222 formed between the two buttons 224 is formed at the peripheral edge of the thicker diameter hole 122 formed in each leg portion 12 of the suspension arm body 10 when the plastic insert molding 20 is injected, So that the coupling force between the suspension arm body 10 and the plastic insert molding 20 can be increased.

Fig. 3 is a rear view of the hybrid suspension suspension 1 for a vehicle manufactured by the manufacturing method according to the embodiment of the present disclosure, and Fig. 4 is a sectional view taken along line A-A of Fig.

The plastic molding body 20 may be integrally formed with one or more reinforcing ribs 26 in the form of a lattice pattern. The shape of the reinforcing ribs 46 can be manufactured using a computer optimum design program so that the weight of the insert molding 20 can be minimized.

Referring to Fig. 4, the suspension arm body 10 may have two engagement flanges 17 bent inward in the width direction thereof. The engagement flange 17 may have a shape bent inwardly from a lateral end portion of each leg portion 12.

The two coupling flanges 17 are formed to face each other and are inserted into the plastic insert molding 20 during the injection of the plastic insert molding 20, And is inserted into the fixing portion 20a.

According to this structure, since the upper face, the lower face, and the side face of the coupling flange 17 are supported by the fixing portion 20a, there is less room for the gap between the insert molding 20 and the coupling flange 17 to occur, Even if a crack is generated in the molding 20 itself, there is little room for separation from the suspension arm body 10. Therefore, the coupling strength between the suspension arm body 10 and the plastic insert molding 20 is increased.

5 is a cross-sectional view of the ball joint 40 of the hybrid suspension suspension for a vehicle 1 according to one embodiment of the present disclosure.

5, the ball joint 40 may be integrally coupled with the plastic insert molding 20 as the plastic insert molding 20 is injected into the pipe 18 of the suspension arm body 10 have.

The insert molding 20 encapsulates the bearing 42 while being penetrated between the bearing 42 and the pipe 18 and can firmly fix the bearing 42 to the pipe 18 after curing. The bearing 42 surrounds the spherical portion of the ball stud 41 and the dust cover 43 surrounds the stick portion of the ball stud 41 so that the bearing 42 does not enter the bearing.

FIG. 6 is an assembly view showing a manufacturing procedure of a manufacturing method (S100) of a hybrid suspension suspension for a vehicle 1 according to an embodiment of the present disclosure, and FIG. 7 is a perspective view of a hybrid suspension suspension for a vehicle 1 (S100) of Fig.

6 and 7, a method of manufacturing a hybrid suspension suspension for a vehicle according to an embodiment of the present invention includes first preparing a ball stud 41 using steel material (S110), fabricating a bearing 42 using plastic The ball stud 42 is engaged with the ball stud 41 (S130). At this time, lubricating oil may be injected between the bearing 42 and the ball stud 41 to improve the performance of the bearing 42.

Subsequently, the suspension arm body 10 is manufactured (S140) using the steel plate, the pipes 16 and 18 are welded to the suspension arm body 10 by welding (S150), and the ball stud 42 and the bearing 41 (S160).

Subsequently, the suspension arm body 10 is inserted into a mold and a plastic resin is injected so that the suspension arm body 10 and the plastic insert molding 20 are coupled (S170) to each other.

Then, the bush 30 is press-fitted into the bush pipe 16 to be assembled (S180), and the dust cover 43 is covered with the ball stud 42 to be fixed to the ring clip 44 (S190) Can be terminated.

FIG. 8 is a perspective view of a hybrid suspension suspension 300 for a vehicle according to another embodiment of the present disclosure, and FIG. 9 is a sectional view taken along line B-B of FIG.

8 and 9, a hybrid suspension suspension 300 for a vehicle according to another embodiment, which may be applied to a lower control arm, is shown. The lower control arm may have a shape such as, for example, a '?' Character.

The hybrid suspendable arm 300 for a vehicle may include a suspension arm body 310 capable of manufacturing a high strength steel plate for a vehicle by a general press method. A plastic insert molding 320 may be integrally coupled to the inside of the suspension arm body 310 by injection molding.

The suspension arm body 310 may include two leg portions 312, 314 integrally connected to each other. A bushing projection 316 in the form of a pipe may be integrally formed on one of the leg portions 312 and a plastic insert molding 320 may be inserted into the bushing projection 316 to be coupled thereto. A bush (not shown) may be coupled to the bush coupling protrusion 316 and mounted on the vehicle body.

The plastic insert molding 320 may be injection molded into the other leg portion 314 and the ball joint 40 may be inserted into the coupling end of the plastic insert molding 320 so as to be integrally injection-molded.

A large diameter hole 318 is formed in the center portion of the '?' Shape of the suspension arm body 310 and a large diameter hole 318 can be disposed between the bush joint protrusion 316 and the ball joint 40, And may be formed on one side of the suspension arm body 310. A bush (not shown) may be press-fitted into the large-diameter hole 318 to be coupled.

In order to increase the coupling between the suspension arm body 310 and the plastic insert molding 320, at least one heavy-weighted hole is formed in the suspension arm body 310, and the enlarged diameter extends to the peripheral edge of the heavy- One or more buttons 322 may be formed in the plastic insert molding 320 in the form of a button.

One or more small diameter holes may be formed in the suspension arm body 310 and one or more small diameter engagement rims 324 may be formed in the plastic insert molding 320 so as to extend radially to the peripheral edges of the small diameter holes.

In addition, the suspension arm body 310 may be formed with a hollowed-out hole 330 so as to be recessed over the upper surfaces of the two leg portions 312 and 314. The well 330 may be separately formed on the upper surfaces of the two leg portions 312 and 314, or may be formed on only one leg portion. Such a well 330 may increase the rigidity of the suspension arm body 310 itself.

The insert molding 320 is inserted between the bent portion of the well 330 and the side surfaces of the two leg portions 312 and 314 and the insert molding 320 is contracted during the cooling process and the insert molding 320 ) Acts on the force to tighten these bent parts. Accordingly, the coupling force between the insert molding 320 and the suspension arm body 10 can be increased.

The structure associated with this well 330 may also be applied to the hybrid suspension arm 1, 400 described above.

9, the suspension arm body 310 is formed with two engagement flanges 319 bent inward in the width direction thereof, and the two engagement flanges 319 are formed so as to face each other, Two engagement flanges 319 are inserted into the plastic insert molding 320 when the molding 320 is injected so as to increase the coupling force between the suspension arm body 310 and the plastic insert molding 320.

FIG. 10 is a perspective view of a hybrid suspension suspension 400 for a vehicle according to another embodiment of the present disclosure, and FIG. 11 is a cross-sectional view taken along the line C-C of FIG.

Referring to FIG. 10, a hybrid suspension suspension for a vehicle according to another embodiment of the present disclosure may be applied to the lower control arm 400. The lower control arm 400 may include a suspension arm body 410 capable of manufacturing a high strength steel plate for a vehicle by a general press method. A plastic insert molding 420 may be integrally coupled to the inside of the suspension arm body 410 by injection molding. The suspension arm body 410 may include two leg portions 412, 414.

The plastic insert molding 320 may be injection molded into one of the leg portions 412 and the ball joint 40 may be inserted into the coupling end of the plastic insert molding 420 to be integrally injection-molded. A large-diameter bushing engagement hole 418 is formed at the distal end of the other leg portion 414, and a bushing (not shown) can be press-fitted into the large-diameter bushing engagement hole 418.

The bush pipe 430 may be integrally coupled to an edge where the two leg portions 412 and 414 meet.

The bush pipe 430 may be disposed between the ball joint 40 and the large-diameter bushing engagement hole 418.

In order to increase the coupling between the suspension arm body 410 and the plastic insert molding 420, a thick-walled hole is formed in one leg 414 of the suspension arm body 410, A flanged bore 416 may be provided.

One or more small diameter holes may be formed through the two leg portions 412 and 414 to increase the coupling between the suspension arm body 410 and the plastic insert molding 420, One or more buttons 422 may be formed in such a manner as to fill the small-diameter holes and extend radially to the peripheral edges of the small-diameter holes.

The one or more buttons 422 may be formed in a polygonal shape such as a circular or tetragonal shape.

11, the suspension arm body 410 is formed with two engagement flanges 419 bent inward in the width direction thereof, and the two engagement flanges 419 are formed so as to face each other, The two engagement flanges 419 are inserted into the plastic insert molding 420 at the time of injection of the molding 420 to increase the coupling force between the suspension arm body 410 and the plastic insert molding 420.

The hybrid suspension arm (1, 300, 400) for a vehicle may include a coupling portion in which a suspension arm body and a portion of the insert molding intersect with each other to prevent separation of the suspension arm body and the insert molding from each other.

For example, the coupling portion may include, but is not limited to, a flange structure, a button structure, a reinforced structure, and the like, and any structure may be employed so long as the coupling structure between the suspension arm body and the insert molding can be improved without any additional means. Can be applied. The flange structure including the engagement flanges 17, 319, and 419 and the button structure including the buttons 224, 322, and 422 have been described in detail in FIGS. 1 to 11, and the reinforcing structure will be described below.

12 is a bottom view of a suspension arm body 10 provided with a reinforcing plate 50 according to the present disclosure and FIG. 13 is a bottom view of a hybrid suspension arm 1 for a vehicle provided with a reinforcing plate 50 according to the present disclosure . 14A is a sectional view taken along the line A-A 'in FIG. 13, and FIG. 14B is a sectional view taken along the line B-B' in FIG. The specific structure of the suspension arm body 10 can be found in Fig.

12 and 13, at least one reinforcing plate 50 is inserted and fixed in a 'C' shaped space formed by the suspension arm body 10, and welded to both inner sides of the suspension arm body 10 And can be fixed. In addition, the insert molding 20 encloses the reinforcing plate 50.

The reinforcing plate 50 may be made of a metal material and may be made of aluminum to reduce weight.

The reinforcing plate 50 can be disposed in the direction of the cross section of the leg portion of the suspension arm body 10. Three reinforcing plates 50 may be provided for each leg, and the direction in which the reinforcing plate 50 is installed may be provided not only in a direction perpendicular to the longitudinal direction of the leg portions, but also in an oblique direction with respect to the longitudinal direction of the leg portions .

14A, since the reinforcing plate 50 is not welded to the inner upper surface of the suspension arm body 10, the insert molding 20 passes between the inner upper surface and the upper surface of the reinforcing plate 50 Space can be provided.

At least one hole 51 may be formed in the reinforcing plate 50 and the insert molding 20 may pass through the hole 51. [

14B, since the hole 51 is formed, it can be seen that the reinforcing plate 50 is inserted into the insert molding 20, and that the overall rigidity of the hybrid arm is increased In addition, it is possible to increase the bonding force between the suspension arm body and the insert molding.

15 is a sectional view of a hybrid suspension suspension for a vehicle provided with another reinforcing plate 60 according to the present disclosure.

The other reinforcing plate 60 has two pieces separated from each other and has a shape similar to the leg portion of the suspension arm body 10 and may be arranged in a direction parallel to the suspension arm body 10 .

The other reinforcing plate 60 can be disposed along the length direction of the leg portion. In other words, the other reinforcing plate 60 may have a structure in which the leg portions of the suspension arm body 10 are arranged in a double-layer structure.

Unlike the stiffening plate 50, the upper surface of the other stiffening plate 60 can be welded to the inner upper surface of the suspension arm body 10, and between the upper surfaces of the separate stiffened plates 60 The inserts can be inserted into the space of the insert.

Unlike the reinforcing plate 50, the upper surface of the other reinforcing plate 60 is spaced apart from the upper surface of the reinforcing plate 60 and the upper surface of the suspension arm body 10, No insert is inserted into this space.

The other reinforcing plate 60 may have a flange structure to improve a coupling force with the insert body 20. [ Therefore, the lower end of the other reinforcing plate 60 may be formed to be bent inward in the width direction of the reinforcing plate 60.

16 is a cross-sectional view of a hybrid suspension arm 1 for a vehicle in which another reinforcing plate 70 according to the present disclosure is installed.

Unlike the other reinforcing plate 60, another reinforcing plate 70 has a structure that is not divided into two pieces but has a structure separated into one, and the inner upper surface of the suspension arm body 10 and another reinforcing plate 70 The top surface has a considerable length of space difference.

The other reinforcing plate 70 may have a flange structure to improve the coupling force with the insert body 20. [ Therefore, the lower end of the other reinforcing plate 70 may be formed to be bent inward in the width direction of the reinforcing plate 70. [

In the following, a configuration for improving the contact ratio between the ball stud 41 and the ball bearing 42 in the ball joint 40 shown in Figs. 1 and 5 is shown.

17 is a perspective view showing a structure in which grooves 421 and 422 are applied to the ball bearing 42 of FIG. On the inner spherical surface of the ball bearing 42, a longitudinal groove 421 or a transverse groove 422 may be formed.

The presence of such grooves 421 and 422 is filled with lubricant or grease into the grooves 421 and 422 such that the grease is more distributed on the spherical surface of the ball of the ball stud 41 when the ball stud 41 is moved . Accordingly, the ball portion of the ball stud 41 and the inner spherical surface of the ball bearing 42 can be more smoothly brought into contact with each other.

18 is a perspective view showing a structure in which a slot 423 is applied to the ball bearing 42 of FIG.

The slot 423 may be disposed along the upper cutting line of the ball bearing 42. The slot 423 can reduce the pressure applied to the inner spherical surface of the ball bearing 42 in the direction of movement of the ball stud 41 when the ball stud 41 is moved so that the ball bearing 42 and the ball stud 42 41 can be improved.

18 shows experimental data for selecting the appropriate number of holes to be formed in the hybrid arm for a vehicle.

It is necessary to select an appropriate number of the small-diameter holes or the medium-diameter holes in the hybrid arms 100, 200, 300, and 400 for a vehicle described above. On the other hand, in the case of the large-diameter hole, since there is usually only one, there is no need to select the number.

In the test conditions on the right side, (a) corresponds to the case where the number of holes is the largest, (b) the number of holes is smaller than that of (a) Respectively.

If you look at the graph on the left, the greater the number of buttons, the higher the jointing effect and strength-enhancing effect of insert molding can be. However, in the case where there is a button having an appropriate range number or more, the reinforcing effect may be reduced. Based on this, it can be concluded that the number of buttons is unconditionally large, so it does not produce the maximum synergy effect.

In the case of the vehicle U-shaped hybrid arm 100 used as the upper control arm, as shown in Fig. 2, the center hole 222 and the small hole 224 are formed in two to four .

In the case of the hybrid arm 200, 300, 400 for a vehicle having a λ-shape used as a lower control arm, it is also preferable that about two to four buttons are arranged on each leg. Specifically, it is preferable that two to four buttons are arranged on the long leg portion where the large-diameter hole is formed, and one to three buttons are preferably arranged on the short leg portion where the ball joint is installed.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. For example, it is contemplated that the techniques described may be performed in a different order than the described methods, and / or that components of the described structures, devices, and the like may be combined or combined in other ways than the described methods, Appropriate results can be achieved even if they are replaced or replaced.

Therefore, other implementations, other embodiments and equivalents to the claims are within the scope of the following claims.

10: Suspension arm body
12: Leg portion
14: joint part
20: Plastic insert molding
22: leg portion
24: joint part
30: Bush
40: ball joint
310: Suspension arm body
320: Plastic insert molding
410: Suspension arm body
420: Plastic insert molding

Claims (28)

Suspension arm body made of steel; And
And a plastic insert molding insert coupled to the suspension arm body. The method according to claim 1,
And an engaging portion, wherein a portion of the suspension arm body and a portion of the insert molding intersect each other to prevent the suspension arm body from being separated from the insert molding,
Wherein the engaging portion includes a flange structure,
Wherein the flange structure comprises:
A coupling flange formed to be bent inward in the width direction of the suspension arm body; And
And a portion of the plastic insert molding, wherein the coupling flange is inserted. 3. The method of claim 2,
Wherein the engaging portion includes a reinforcing structure,
Wherein the reinforcing structure includes a reinforcing plate inserted and fixed in the suspension arm body and in contact with the insert molding. The method of claim 3,
Wherein the reinforcing plate is disposed in the cross-sectional direction of the suspension arm body,
Wherein the insert molding surrounds the reinforcing plate. 5. The method of claim 4,
At least one hole is formed in the reinforcing plate,
Wherein the insert molding passes through the hole. The method of claim 3,
Wherein the reinforcing plate is disposed in a direction parallel to the suspension arm body,
And a portion of the insert molding is inserted into and joined to the reinforcing plate. The method according to claim 6,
And the end of the reinforcing plate is formed to be bent inward in the width direction of the reinforcing plate. 3. The method of claim 2,
Wherein the engaging portion includes a button structure,
The button structure comprises:
At least one hole formed in the suspension arm body;
And one or more buttons formed from the plastic insert molding and inserted into and filled in the one or more holes and extending to a peripheral edge of the at least one hole. 9. The method of claim 8,
The suspension arm body includes two leg portions and a joint portion integrally connecting the two leg portions;
The plastic insert molding includes two leg portions and a joint portion integrally connecting the two leg portions;
Wherein the at least one hole includes at least one small-diameter hole arranged at a predetermined interval along the longitudinal direction in each of the two leg portions;
Wherein the at least one button is sized to be radially expanded to the peripheral edge of the one or more small diameter holes as well as being inserted and filled into the at least one small diameter hole. 10. The method of claim 9,
Wherein the at least one small-diameter hole includes two or more small-diameter holes disposed adjacent to each other;
At least one large-diameter hole having a relatively large diameter is formed between the two or more small-diameter holes;
And a heavy metal coupling frame having a part of the plastic insert molding inserted into the heavy hole and extending radially to the peripheral edge of the heavy hole is formed in the plastic insert molding. 10. The method of claim 9,
Wherein the at least one hole includes a large-diameter hole formed in the joint portion of the suspension arm body;
Diameter hole is formed in the plastic insert molding so that a part of the plastic insert molding is inserted into the large-diameter hole, and a large-diameter engaging rim extending radially to the peripheral edge of the large-diameter hole is formed in the plastic insert molding. Suspension arm body made of steel;
A plastic insert molding inserted and joined to the suspension arm body;
The suspension arm body includes:
Two leg portions; And
A joint portion integrally connecting the two leg portions;
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A bush pipe is welded to each of the front ends of the two leg portions; And a ball joint pipe is welded to the distal end portion of the joint portion. 13. The method of claim 12,
The ball joint pipe being located at a central portion between the bush pipes;
The bush pipes being disposed horizontally open;
And the ball joint pipe is arranged to be opened in a vertical direction. 14. The method of claim 13,
The bushes are respectively press-fitted into the bush pipes;
And the ball joint pipe is press-fitted into the ball joint pipe. The method according to claim 1,
Wherein at least one reinforcing rib of a grid pattern is formed integrally with the plastic insert molding. Suspension arm body made of steel;
A plastic insert molding inserted and joined to the suspension arm body;
The suspension arm body includes two leg portions,
Wherein one of the two leg portions is integrally formed with a pipe-shaped bush attachment projection;
And the plastic insert molding is inserted into and engaged with the bushing projecting portion. 17. The method of claim 16,
Wherein the other of the two leg portions is injection molded by the plastic insert molding;
And a ball joint is inserted into the joint tip of the plastic insert molding so as to be integrally injection-coupled. 18. The method of claim 17,
Wherein the suspension arm body is formed with a large-diameter hole, and the bush is press-fitted into the large-diameter hole to be engaged with the suspension. 19. The method of claim 18,
And the large-diameter hole is formed on one side of the suspension arm body between the bush joint projection and the ball joint. Suspension arm body made of steel;
A plastic insert molding inserted and joined to the suspension arm body;
The suspension arm body includes two leg portions,
One of the two leg portions being injection-molded into the plastic insert molding;
And a ball joint is inserted into the joint tip of the plastic insert molding so as to be integrally injection-coupled. 21. The method of claim 20,
Diameter bushing engagement hole is formed at the distal end of the other leg portion of the two leg portions, and the bushing is press-fitted into the large-diameter bushing engagement hole to be engaged with the large-diameter bushing engagement hole. 22. The method of claim 21,
And a bush pipe is integrally joined to an edge where the two leg portions meet. 23. The method of claim 22,
And the bush pipe is disposed between the ball joint and the large-diameter bush coupling hole. 12. The method of claim 11,
Wherein one of the two leg portions has a thick-walled hole formed therein;
And a flange having a large diameter bent toward the inside of the plastic insert molding is provided on the suspension arm body. Fabricating a ball stud using a steel material;
Fabricating the bearing using plastic;
Coupling the bearing to the ball stud;
Fabricating a suspension arm body using a steel plate;
Attaching a ball joint pipe and a bush pipe to the suspension arm body;
Pressing the assembly of the ball stud and the bearing into a ball joint pipe and assembling the same;
Inserting the suspension arm body into a mold and injecting a plastic resin to cause the plastic insert molding to be coupled to the suspension arm body;
Pressing and assembling the bush into the bush pipe;
And covering the ball stud with a dust cover to secure it with a ring clip. 26. The method of claim 25,
Further comprising the step of injecting lubricating oil into the bearing. 26. The method of claim 25,
The suspension arm body
Two leg portions; And
A joint portion integrally connecting the two leg portions;
Wherein the method comprises the steps of: 26. The method of claim 25,
The ball joint pipe is disposed at a central portion between the bush pipes
Being located;
The bush pipes being disposed horizontally open;
And the ball joint pipe is arranged to be opened in a vertical direction.

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